Berlin-based digital green energy provider Ostrom has secured €20 million in Series B funding, led by Eneco Ventures, the venture capital arm of Dutch sustainable energy leader Eneco. The round also saw participation from existing investors SE Ventures, Union Square Ventures, Adjacent, Übermorgen, and J12. This new round brings Ostrom’s total funding to over €40 million.
Founded in 2021 and headquartered in Berlin, Ostrom is a certified B Corp™ committed to reshaping energy consumption through full transparency, 100% certified green electricity, and a digital-first customer experience. The company allows users to cancel monthly and switch providers with ease—ensuring simplicity, control, and sustainability in one seamless platform.
Led by CEO Matthias Martensen, Ostrom’s core product offering is built around two smart subscription models:
- SimplyFair: Offers predictable and flexible monthly billing based on a flat rate, simplifying household budgeting.
- SimplyDynamic: Utilizes smart meters and dynamic hourly pricing, enabling users to reduce energy costs and consume electricity when it’s most environmentally friendly.
The Ostrom app is the control center for energy management. It allows customers to monitor, optimize, and automate energy consumption, integrate with electric vehicles (EVs), home charging stations, solar panels, and battery storage systems—fostering energy independence at the household level.Strategic Growth Powered by Automation and AI
In 2024, Ostrom tripled its customer base and launched Germany’s largest EV-based Virtual Power Plant (VPP). With this new funding, the company plans to:
- Subsidize smart meter rollout across Germany to unlock demand-side flexibility.
- Expand its NeoGrid™ Virtual Power Plant, which links home energy devices and EV batteries to balance grid loads, reduce costs, and increase renewable energy usage.
- Enhance its AI-powered automation—already handling over 50% of customer operations automatically—to maintain a lean and efficient team structure ready for further scaling.
“This Series B funding round represents more than just capital — it’s about strategic partnership. Eneco brings deep industry expertise while Ostrom maintains full independence, strengthening our platform as we accelerate smart meter adoption and scale our virtual power plant.”
— Matthias Martensen, Co-Founder & CEO of Ostrom
“Combining Eneco’s energy veterancy with Ostrom’s relentless product and customer focus enables us to use AI as a powerful multiplier… solving 50% of customer requests through AI, and allowing our small, highly capable teams to stay agile, innovative, and execution-driven.”
— Karl Villanueva, Co-Founder & CMO/CPO of Ostrom
With a strong focus on medium-term profitability and grid optimization, Ostrom is well-positioned to lead the digital transformation of energy infrastructure in Europe.
